Fair Value Measurements - Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Assets:
Total assets	$ 19,123	$ 27,189
Liabilities:
Total liabilities	9,683	24,537
Level 1
Assets:
Total assets	18,870	26,313
Liabilities:
Total liabilities	0	0
Level 2
Assets:
Total assets	253	876
Liabilities:
Total liabilities	0	0
Level 3
Assets:
Total assets	0	0
Liabilities:
Total liabilities	9,683	24,537
Equity securities
Assets:
Total assets	18,870	26,313
Equity securities | Level 1
Assets:
Total assets	18,870	26,313
Equity securities | Level 2
Assets:
Total assets	0	0
Equity securities | Level 3
Assets:
Total assets	0	0
Common stock options/warrants
Assets:
Total assets	120	855
Common stock options/warrants | Level 1
Assets:
Total assets	0	0
Common stock options/warrants | Level 2
Assets:
Total assets	120	855
Common stock options/warrants | Level 3
Assets:
Total assets	0	0
Forward contracts
Assets:
Total assets	133	21
Forward contracts | Level 1
Assets:
Total assets	0	0
Forward contracts | Level 2
Assets:
Total assets	133	21
Forward contracts | Level 3
Assets:
Total assets	0	0
Contingent consideration
Liabilities:
Total liabilities	9,683	24,537
Contingent consideration | Level 1
Liabilities:
Total liabilities	0	0
Contingent consideration | Level 2
Liabilities:
Total liabilities	0	0
Contingent consideration | Level 3
Liabilities:
Total liabilities	$ 9,683	$ 24,537